I believe you have tonsillitis
White discoloration may appear only on the tonsils or it may appear around the tonsils and throughout the mouth. The discoloration may look like streaks in the back of the throat or blotches on or around the tonsils. In addition to the white spots, your tonsils may feel scratchy and you might find it difficult to swallow.
Other symptoms that often accompany white spots on the tonsils include:
a sore throat
a stuffy nose
body aches and pains
swelling of the lymph nodes
Sometimes, you may also have difficulty breathing. This can occur if your tonsils become extremely swollen and partially block your airway.
Either way I wouldn't mess around and go see someone who can give you something to treat it (maybe even surgery)